Europe's Socialists & Democrats, Renew Europe and Greens have all outlined an intention to combat the EU proposal to relax carbon pricing rules, Politico reports citing sources

Coalition friction of this kind in the European Parliament has historically been the decisive variable for EU climate files: when the centre-left groups, the liberals and the Greens line up together against a Commission or Council position, the proposal in question has usually been amended heavily, delayed, or narrowed rather than passed in its original form, and carbon pricing dossiers have repeatedly been among the most contested. The distinction worth drawing is between the headline principle, relaxing the rules, and the mechanics underneath it, since the transmission to EUA prices runs through the expected supply of allowances and the credibility of the cap trajectory rather than through the political rhetoric itself. On previous occasions, parliamentary opposition of this breadth has tended to shift the outcome in trilogue rather than at the plenary vote, with concessions negotiated before final adoption. The tells are whether the group positions harden into formal amendments, how the EPP and the Council's member-state split align, and whether the ETS revision is handled on an accelerated or standard timetable. Reported intentions citing sources carry less weight than committee positions once tabled, so the signal is directional pending confirmation of voting lines.